Micro-Cu Doped Co3O4 as an Effective Oxygen Reduction Nano-flower-like Catalyst to Enhance the Power Output of Air Cathode Microbial Fuel Cell

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2024-08-12 DOI:10.1007/s10562-024-04779-8

Cheng Li, Yao Yang, Jinrong Lu, Linde Ren, Xiayan Zhang, Cong Li, Xuan Yang, Yao Xiang, Hua Liu

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Abstract

Air cathode microbial fuel cell (MFC) can use the biological activities of microorganisms to convert organic matter into ideal electrical energy, but this efficiency has not been satisfactory. The air cathode requires an optimal catalyst to enhance the power output of the MFC by improving its low oxygen reduction reaction (ORR) activity. Micro Cu-doped Co₃O₄ nano-flower-like catalyst is successfully synthesized in this study using a metal-organic framework as the precursor material. The addition of 5% Cu induces a higher concentration of oxygen vacancies, thereby optimizing the local electronic state of the active site and enhancing the catalytic performance for oxygen reduction in the 5% Cu-Co₃O₄ material. Consequently, when equipped with this material, the power output of the air cathode MFC is approximately 2.85 times greater than that achieved with pure Co₃O₄. This provides a novel design idea for the application of nano-flower-like transition metal oxygen reduction catalysts in MFC.

Graphical Abstract

Abstract Image

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微掺铜 Co3O4 作为一种有效的氧还原纳米花状催化剂提高空气阴极微生物燃料电池的功率输出

空气阴极微生物燃料电池（MFC）可以利用微生物的生物活性将有机物转化为理想的电能，但这种效率并不令人满意。空气阴极需要一种最佳催化剂，通过改善其低氧还原反应（ORR）活性来提高 MFC 的功率输出。本研究以金属有机框架为前驱材料，成功合成了微掺铜 Co3O4 纳米花状催化剂。5％Cu 的添加诱导了更高浓度的氧空位，从而优化了活性位点的局部电子状态，提高了 5%Cu-Co3O4 材料的氧还原催化性能。因此，当使用这种材料时，空气阴极 MFC 的功率输出大约是使用纯 Co3O4 时的 2.85 倍。这为纳米花状过渡金属氧还原催化剂在 MFC 中的应用提供了一种新的设计思路。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.